Machine for rolling sheet metal



(No Model.)

v 2 Sheets-Sheet 1 'A. J. DEMMLER. Y

v MACHINE FOR ROLLING SHEET METAL.

Patented Apr. 18, 1882.

PETfiRS. Photo-Lithographs. Waxhi nnnnnn C.

I greater number of passes with comparatively scribed and claimed.

ei UNITED STATE-S PATENT OFFICE.

ALBERT J. D EMMLER, OF PITTSBURG, PENNSYLVANIA.

MACHINE FOR ROLLING SHEET METAL.

SPECIFICATION-forming part of Letters Patent No. 256,652,jdated April 18, 1882.

r Application filed February 2, 1882. (No modelJ a To all whom it may concern Be it known that I, ALBERT J. DEMMLER, a citizen of the United States, residing at Pittsburg, county of Allegheny, State of Pennsylvania, haveinventedor discovered a new and useful Improvement in Machines for Gold-Bolling Thin Metal Plates; and I do hereby declare the following to be a full, clear, concise, and exact description thereof, reference being had to the accompanying drawings, making a part of this specification, in which-likeletters indicating like parts I Figure 1, Sheet 1, is. a transverse sectional view of my improved machine, the section be ing'taken inthe plane of the line 00 m, Fig. 2; and Fig. 2, Sheet 2, shows a front elevation of the machine. a r a I In cold-rolling thin plates or sheets of iron for tinning. and otherv uses'considerable di'fficulty has been experienced, arising from a tendency in the thin plates to'curl, warp, or draw transversely on the feed sideof the rolls. This difficulty is especially troublesome when considerable pressure is applied through the rolls, and in order to avoid it'as far as possibleit has been customary to cold-roll the'plates by a light pressure, resulting in slow red action with a corresponding increasein expense.

My invention is de'signedto obviate this difficulty-by feeding theplates to the reducingrolls by means of feed-rolls aboveor'below the plane of passage between thereducing-rolls, whereby the plates are bent in the direction of feed, and thus stiffened as against transverse curling, warping, or bending under pressure from the reducing-rolls, as hereinafter de- In the drawings, A A represent two cylindrical plain-faced rolls-such, for example, as are commonly employed for cold-rollin g iron plates for tinning. These rolls are mounted in two housings, B B, by the usual or any suitable adjustable bearings, B, adapted to setthe rolls for plates of diflerent thickness.

The usual roll-necks, A, are provided for coupling the rolls to any suitable driving mechanism-such, for example, as is usually employed for like purposes.

0n the feeding side of the rolls, above their plane of bite or passage, are mounted two feeding-rolls, O O, in adjustable bearings 0, which are secured in thefusual way in slotted openings 0, made in each of two bearing plates or blocks, D D, which latter are secured by bolts 61 and. slotted bolt-holes d to the inner or adjaeent side faces of the main housings. In order to give motion to these feed-rolls I employ a third roll, 0 of the same size as rolls 0 O, and mounted in slots 0 above them in substantially the same manner. By means of adjusting-screws c this supper roll, 0 is pressed upon the intermediate or upper feed-roll, O,

sufliciently to communicate the desired power by friction. Also, the bearing-blocks D areadzjusted by means of the slot-and-boltconuections 61 d, so as to cause the roll 0 to .bear against the upper reducing-roll A, by preference, in or near the horizontal plane through its axis. The'motion of the reducing-roll will thus be communicated through frictional contactzto theupp'erfeed-roll, O, and from it, through the interposed plate, to the'lower feedroll, 0.

In order to preserve-as large size as practicable in the two feed-rolls, and also cause them to stand away from the reducing-roll sufficiently to prevent the roll C from touching it, and also permit'of passing the plate-downward between rolls 0 and A without making too short a bend, I incline the plape of the three. rolls 0 O OZ'asin Fig. 1, thus bringing these rolls '0 O4 away from A. The same results may'be secured, however, by mounting the roll O out of line with the other two; but for simplicity of construction and facility of making adjustments I prefer the construction shown.

Instead of driving the feed-rolls by a friction-roll, as described, they may be geared with either of the reducing-rolls to run at the required speed to feed at the proper rate, and in'such case the feed-rolls may be removed a little farther from the reducing-rolls; ,but I prefer to drive the feed-rolls .by friction, as described, whereby the proper rate of feed is se- 7 in any desired number, three being shown. (See Fig. 2.) These bars consist of horizontal portions 0, the upper surfaces of which are in the plane of feed between rolls 0 O, curved portions c dipping under roll 0, and inclined portions 0 extending downward from rolls 0 0 toward the passage between rolls A A.

The parts eof the bars form a horizontal feed-table for presenting plates to the feed rolls, and the inclined parts 6 are designed to hold the plates against the surface of upper roll, A, as they are delivered from the feedrolls, and to present them properly for passage through the reducing-rolls. These bars may be supported in the described position in any convenient way. I have shown them at their outer ends connected hylips orlugsiand keys '5 to a cross-bar, I, which latter is st cured in front of the housings by downwartlly-bent ends, which pass through sockets I, and are secured therein by shoulders t' ahove and keys 1' be-ow. These sockets l are rigidly secured to the housings in any convenient way, and alTord a stable support for the rod, and at the same time permit of its removal when desired. Also, trom a point in the bars E near the feedrolls vertical supports or posts it extend downward and rest upon the fore-plate P, or upon a transverse bar, N, which latter is supported at its ends by blOt'kS or keys it, placed in vertical openings N made in the adjacent side faces of the housings B. By changing the blocking a the inner ends of bars E may be raised or lowered in order to bring them in proper relationship to both the feeding and reducing rolls. The vertical supports a are strengthened by braces 0. Also, a bar or brace, 0, is extended from n to the inclined fingers e in order to give them increased stability.

When it is desired to use the reducing-rolls A on heavy plates not subject to difficulties experienced with thin plates the guide-bars E may be removed readily and the fore-plate P be employed in the usual way; but in the application of my invention with the means described this fore-plate may be omitted.

In operation sheets or plates of iron to be cold-rolled are placed on the horizontal table 0 c and presented singly to the feed-rolls O C, by which each plate in succession is carried forward against the periphery of the upper reducing-roll. They are thus deflected downward, and, being held against or near the surface of roll A by the inclined fingers 0 they are presented to the reducing-rolls in proper position to be passed between the same. The inclined fingers it also serve to keep the following edge of the plate bent upward against roll A after it leaves the feed-rolls. The bend thus given to the plate in the direction of feed stiffens it against tendency to bend, curl, warp, or draw transversely to the line of feed. (Jouseqnently the plates may be subjected to heavy pressure and cold-rolled rapidly without danger of loss or injury, which has heretot'oreattended such cold-rolling.

It is obvious that the feed-rolls C C may be placed below the plane of passage between the reducing-rolls, and the plates be bent upward for such passage instead of downward, thereby securing substantially the same results, the object being to pass the plates to the reducing-rolls from a different plane from that of their passage through such rolls, thereby bending the plates in the direction of the line of feed, and stiffening them as against warping, curling, or bending transversely to such line.

Instead of making the parts 6 c of the bars E integral, they may be separate, and separately supported in any suitable way. Also, instead of separate bars E, continuous plates may be used both for horizontal table 6 and guidee Other like modifications may be made in the details of construction without departiug from my invention.

I claim herein as my invention 1. In a machine for cold-rolling thin iron plates, the combination of two reducing-rolls and two feed-rolls parallel with the reducingrolls, with the passages between such two sets of rolls in difl'erent planes, substantially as and for the purposes set forth.

2. The combination of two reducing-rolls, A, two feed-rolls, O, and friction-roll 0 having bearing upon one or the reducing-rolls, and also 011 one of the feed-rolls, substantially as set forth.

3. The combination of two reducing-rolls, two feed-rolls parallel with the reducing-rolls, but with passage through such two sets of rolls in difi'erent planes, and a guide for direct ing the plates from the feed to the reducing rolls, substantially as set forth.

4. The combination of reducing-rolls A,feedrolls 0 0 parallel with but above the plane of passage through the reducing-rolls,inclined guide 0 and horizontal table a, substantially as set forth.

5. The combination of housings B, reducingrolls A, feed-rolls O O, friction driving-roll O and adjustable bearing-plates I), secured to the inner side faces of the housings, snbstantiall y as described.

In testimony whereof I have hereunto set my hand.

ALBERT J. DEMMLER.

Witnesses:

G. L. PARKER, R. H. WmrrLEsnY. 

